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IBM BIOS Beep Codes – BIOS Central























  • IBM
    Desktop BIOS Beep Codes

  • IBM
    Thinkpad BIOS Beep Codes

  • IBM
    Desktop BIOS Beep Codes:

Beeps

Error
Message

Description

1 short Normal POST System is booting properly
2 short Initialization error Error code is displayed
1 long, 1 short System board error
1 long, 2 short Video adapter error
1 long, 3 short EGA/VGA adapter error
3 long 3270 keyboard adapter
error
Continuous Power supply error Replace the power supply
999s Power supply error Replace the power supply
No beep Power supply Replace the
power supply

IBM
Thinkpad BIOS Beep Codes:

Beeps/Error

Description

Continuous beeping System board failure
One beep; Unreadable,
blank or flashing LCD
LCD connector problem;
LCD backlight inverter failure; video adapter faulty; LCD assembly
faulty; System board failure; power supply failure
One beep; Message “Unable
to access boot source”
Boot device failure;
system board failure
One long, two short beeps System board failure;
Video adapter problem; LCD assembly failure
One long, four short
beeps
Low battery voltage
One beep every second Low battery voltage
Two short beeps with
error codes
POST error message
Two short beeps System board failure





















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